单词：intensity of roentgen rays
单词：intensity of roentgen rays 相关文章
Health Report - Mouth X-Rays and the Brain; Infected Gums Do Not Cause Heart Attacks This is the VOA Special English Health Report. A new study suggests that dental X-rays may increase the risk of the most common kind of brain tumor. However, experts
2012年VOA慢速英语(四)月
Gamma Ray Observatory to Open Soon in Mexico 墨西哥建造伽马射线天文台即将开放 American and Mexican scientists have completed construction of the world's largest gamma ray observatory, situated high in central Mexicos Sierra Negra Moun
VOA标准英语2015年(四月)
UV Rays Strip Small Galaxies of Star Stuff紫外线辐射会阻止小星系形成 The sun spews out ultraviolet radiationthat's why you put on sunscreen. But the sun isn't the only UV-producing celestial body. Stars and supermassive black holes produ
2017年Scientific American(三)月
As summer approaches we all enjoy outdoor activities. But with sunlight becoming more intense we should protect our skin from harmful direct exposure to the sun. 随着夏日的到来，我们都喜欢进行一些户外运动。但因为日照愈加强
中英双语新闻
We were walking on sand that was fine-grained and smooth, not wrinkled like beach sand, which preserves the impressions left by the waves. 我们在很细，很平，没有皱纹，像海滩上只留有潮水痕迹的沙上行走。 This dazzling car
《海底两万里》中英双语有声读物